Name: Current and Future Trends in Stochastic Thermodynamics
Start: 2017-09-04T09:00:00+02:00
End: 2017-09-29T18:00:00+02:00
Location: Nordita, Stockholm

Monday, 4 September 2017

09:00 Registration / Coffee & Cake
Registration / Coffee & Cake
09:00 - 11:00
Room: 122:026
14:00 Efficiency, power and dissipation of thermal machines - Bart Cleuren (Hasselt University)
Efficiency, power and dissipation of thermal machines
- Bart Cleuren (Hasselt University)
14:00 - 15:00
Room: 122:026 We consider the performance characteristics of thermal engines. Efficiency at maximum power is discussed in a general setting. In particular, it is demonstrated how successive symmetries placed upon the dynamics manifest themselves at the macroscopic level. A general condition is derived under which thermodynamic devices are able to attain a reversible operation. Second, we derive general relations between maximum power, maximum efficiency, and minimum dissipation regimes from linear irreversible thermodynamics.
Tuesday, 5 September 2017

09:45 Gym Introduction
Gym Introduction
09:45 - 10:15
Room: Gym
14:00 Experiments on thermodynamics, information, and control using a feedback trap - John Bechhoefer (Simon Fraser University)
Experiments on thermodynamics, information, and control using a feedback trap
- John Bechhoefer (Simon Fraser University)
14:00 - 15:00
Room: 122:026 We report experiments that test aspects of the interplay among thermodynamics, information theory, and control. Our goal is to explore the issues raised historically by Maxwell, Szilard, Landauer, Bennett, which have found renewed interest after the development of stochastic thermodynamics. Our setup consists of a time-dependent, “virtual” double-well potential created by a feedback loop that is much faster than the relaxation time of the particle. Focusing on tests of Landauer’s principle of erasure, we extend Landauer's original scenario to cases where less than a full bit of information is erased. We show experimentally that the appropriate thermodynamic definition of a nonequilibrium system connected to a heat bath is given by the Gibbs-Shannon entropy function, evaluated over nonequilibrium probabilities. We also present preliminary results showing how our setup can be modified to model a combined system for work extraction and measurement.
17:00 Kettlebell training
Kettlebell training
17:00 - 17:30
Room: Gym
Wednesday, 6 September 2017
10:00 Experiments on quantum heat transport in electric circuits - Jukka Pekola (Aalto University)
Experiments on quantum heat transport in electric circuits
- Jukka Pekola (Aalto University)
10:00 - 11:00
Room: 122:026 I start by describing how heat currents can be measured in electrical circuits in a low temperature environment. Then I move to two current experiments. The first one is on electronic heat transport through a single-electron transistor, where Wiedemann-Franz law is not obeyed due to Coulomb interaction and quantum processes. The second experiment is on photonic heat transport through a superconducting qubit, where the system acts as an open quantum system with either the qubit-resonator or the resonator-bath coupling acting as the weak coupling.
14:00 How to detect irreversibility from time-series - Dhrubaditya Mitra
How to detect irreversibility from time-series
- Dhrubaditya Mitra
14:00 - 15:00
Room: 122:026 If you look at movies of a tracer particle advected by a turbulent flow and its time-reversed version the two movies look very similar, although the system is not in equilibrium but in non-equilibrium stationary state. Can one detect that the system is indeed irreversible from this time series? This curious question has been address by several recent publications who proposed that the irreversibility manifests itself in the following way: the tracer takes long to accelerate but decelerates quickly. This has been quantified by looking at the third moment of two random variables, the power and the increment of energy over a time-scale $\tau$, defined by $W(\tau) = E(t+\tau) - E(t) $. The PDF of both of these random variables are shown to be negatively skewed. Here we extend this result to heavy inertial particles (for example water droplets in atmosphere) who follow a dissipative dynamics. We show that for the heavy inertial particles the same measure of irreversibility works. In addition, we propose a new measure : The PDF of time over which the power keeps the same sign. The tail of such PDFs are found to be exponential hence we can define a characteristic time scale of gain and loss of energy. The characteristic time scale of gain is slow compared to the time scale of loss.
17:00 Reception
Reception
17:00 - 20:00
Room: 122:026
Thursday, 7 September 2017
10:00 Reconstructing surfaces with the Jarzynski relation - Astrid de Wijn (NTNU)
Reconstructing surfaces with the Jarzynski relation
- Astrid de Wijn (NTNU)
10:00 - 11:00
Room: 122:026
17:00 Kettlebell training
Kettlebell training
17:00 - 17:30
Room: Gym
Friday, 8 September 2017
10:00 Time-reversal symmetry and response for systems in a constant external magnetic field - Lamberto Rondoni (Politecnico di Torino)
Time-reversal symmetry and response for systems in a constant external magnetic field
- Lamberto Rondoni (Politecnico di Torino)
10:00 - 11:00
Room: 122:026 The time-reversal properties of charged systems in a constant external magnetic field are reconsidered, showing that the evolution equations are invariant under novel symmetry operations that imply new signature properties for time-correlation functions under time reversal. Such symmetry relations do not require that the magnetic field be reversed, which makes them applicable to material properties of a single system, rather than of two distinct physical situations. This implies, that Onsager-Casimir relations may be replaced by Onsager reciprocal relations even in the presence of a constant magnetic field, or of mechanically analogous situations. These findings determine, for example, null components of the correlation functions of velocities and currents and of the associated transport coefficients. The theory is developed for both classical and quantum systems, in analogy to Kubo's approach, but the quantum mechanical version leads to new intriguing questions. The theoretical predictions are then illustrated by molecular dynamics simulations of superionic AgI.
16:15 Wonders of viscous electronics in graphene [Nordita Seminar] - Gregory Falkovich (Weizmann Institute)
Wonders of viscous electronics in graphene [Nordita Seminar]
- Gregory Falkovich (Weizmann Institute)
16:15 - 17:15
Room: FA32
Saturday, 9 September 2017
Sunday, 10 September 2017